Boosting a Bridge Artificial Intelligence

Bridge is an incomplete information game which is complex both for humans and for Computer-Bridge programs. The purpose of this paper is to present our work related to the adaptation to Bridge of a recent methodology used for boosting game Artificial Intelligence (AI) by seeking a random seed, or a probability distribution on random seeds, better than the others on a particular game. The Bridge AI Wbridge5 developed by Yves Costel has been boosted with the best seed found on the outcome of these experiments and has won the World Computer-Bridge Championship in September 2016.